SECO-LARM RC-135Q Wireless Motion Alert, White, Sensor range up to 26ft (8m) at 40&deg; angle at 3ft (1m) height, Up to 390ft. (120m) transmission range between sensor and receiver Provides audio and/or visual alert when triggered Sensor range up to 26ft (8m) at 40 angle at 3ft (1m) height Up to 390ft. (120m) transmission range between sensor and receiver Plug and play operation, no hardwiring necessary 4-position switch: Off, Silent, Low, High